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Siemens SIRIUS 3RW4046-2TB05 Soft Starter - 80A, 55kW

Siemens SIRIUS 3RW4046-2TB05 S3 soft starter with motor protection.

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ManufacturerSiemens

Part number3RW4046-2TB05

Type SIRIUS Soft Starter

Size S3

Rated Operational Current 80 A

Max Motor Power 55 kW at 500 V

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CAGE: 9NK75

Smooth motor acceleration Thermistor motor protection Spring-type terminals S3 size Wide control voltage range

Product description

The Siemens SIRIUS 3RW4046-2TB05 is a Size S3 soft starter designed for smooth motor acceleration. It features a rated operational current of 80 A and is suitable for motors up to 55 kW at 500 V. The device operates on a control voltage of 400-600 V AC and is equipped with 24 V AC/DC control terminals. Integrated thermistor motor protection safeguards the motor from overheating.

This soft starter is ideal for applications requiring reduced mechanical stress on machinery and power systems during motor startup. Industries such as material handling, pump systems, and conveyor belts benefit from its ability to provide controlled acceleration, prolonging equipment life and improving operational efficiency. The spring-type terminals ensure quick and secure connections.

Stanlo Automation, a veteran-owned distributor, provides the Siemens 3RW4046-2TB05 SIRIUS soft starter. We offer reliable surplus parts and dedicated service to meet your industrial automation needs.

Technical specifications

Type	SIRIUS Soft Starter
Size	S3
Rated Operational Current	80 A
Max Motor Power	55 kW at 500 V
Control Voltage	400-600 V AC, 24 V AC/DC
Motor Protection	Thermistor
Terminals	Spring-type

Common applications

Conveyor belts

Pump systems

Fans

Compressors

General motor control

Compatible systems

AC motors up to 55 kW at 500 V

Also known as

Siemens SIRIUS 3RW40 soft starter Siemens 80A soft starter

Replaces / compatible with

This soft starter is designed to provide a smoother start-up than direct-on-line starters and is part of the Siemens SIRIUS 3RW40 family.

Technical note

Expert tip

The spring-type terminals on this soft starter provide a maintenance-free connection and are highly resistant to vibration, ensuring reliable operation in harsh environments.

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Frequently asked questions

What type of motor protection is included with the Siemens SIRIUS 3RW4046-2TB05 soft starter?

The Siemens SIRIUS 3RW4046-2TB05 soft starter includes thermistor motor protection. This feature uses a thermistor integrated into the motor windings to monitor temperature and protect against overheating.